I drove the SP1 c along the path deep into what is red territory and parked in a decent sized bush. Three reds drive by. I only get credited with seeing two. Two are destroyed by allies, zero of that damage credited to my passive spotting, the third I destroy after it was hit twice by an ally, again no passive spotting credit awarded to me.

end on match I lose credits

I thought there was something called passive spotting and (bonus) exp for light tanks?

no replays available, it slows my PC too much when on. But to experienced players the bush I was in was in H 0 and the majority of my team were capping in 2, with 1 or 2 tank taking advantage of my spotting by going lower down the line for line of sight shooting.

I expect your allies doing the damage we able to spot the targets themselves. I don't recall any H0 bush that is that great for passive (unless 3x arty). Bushes in the middle of the map on the other hand...

If memory serves me right, A spotted sign comes up on your lower panel indicating you've spotted it first. Thereafter you should see any hit bonuses credit that spotting afterwards. If you didn't spot it first the target would be already registered on the Mini map???

yes I had 2 of 3 tank first credits and zero reward afterwards by team damage done whilst I remained hidden. I guess what I need is a third party to go passive spotting themselves and report if they get any exp for team damage. Or if like me nothing.

I don't go passive spotting often anymore, and now I see even less reason to.

If you were spotting for other players when the damage was done the amount of spotting damaging credit to you is displayed. If it wasn't, and I presume that's the case, then the other tanks were spotting their own targets.

No, you need to start using your brain, enable replays, and put in some effort in trying to figure things out for yourself before deciding to create yet another garbage thread on the forum. It is beyond comprehension that someone with over 17.000 games is not able to figure this one out and feels the need to create a thread for it.

You clearly did not spot the 3rd passing opponent, a team mate did. And if you did not receive any assisted damage, you clearly weren't spotting the opponents anymore, but another player on your team was, and/or those damaging said opponents were able to spot them for themselves. This is so basic, thus one can't help but wonder if you just started playing after buying this account. The alternative would have something to do with a certain gray mass and it's size.

every process demanding access to the HDD slows a PC down and as mine isn't SSD it has a marked effect.

Rubbish.

Writing out a 1MB file during 15 minutes of game won't have any impact. The game will not wait for the writes to complete, it farms that out to the O/S which farms it out to hardware. For the data we are talking about you may as well have an SSD since it won't even fill the HD write buffer.

I think the problem is OP clearly doesn't understand the game mechanics and in his 17K+ games has felt no particular need to learn what those game mechanics are. In some ways I envy the thrill of wonder that OP must experience every time something inexplicable happens that for everyone else would be mundane.